Loss of morning erections: what it can tell you

Why morning erections happen

During sleep, men cycle through REM periods several times a night, and erections occur naturally during many of them. Waking during or just after REM sleep means you notice the last one. These nighttime erections depend on healthy blood flow, intact nerves, and adequate testosterone, but not on sexual thoughts or a partner.

That is why a lasting change in morning erections is informative. If erections with a partner have become difficult but morning erections remain strong, psychological factors such as stress or performance anxiety are more likely. If both have faded, a physical cause is more likely.

Common physical causes

The NIDDK lists a range of conditions and habits that can affect erections. In men over 40, the most common include:

• Atherosclerosis and high blood pressure, which reduce blood flow to the penis
• Diabetes, which affects both blood vessels and nerves
• Low testosterone
• Obstructive sleep apnea, which fragments REM sleep and is linked with lower testosterone
• Obesity, physical inactivity and smoking
• Heavy drinking or alcohol close to bedtime
• Medications, including some antidepressants, blood pressure drugs, diuretics, sedatives, opioids and some ulcer medicines
• Chronic kidney disease, prostate surgery or radiation, and spinal or pelvic nerve problems

Hormonal versus other causes

Testosterone supports sex drive and contributes to nighttime erections, so low testosterone can reduce them, especially if it also comes with lower libido, fatigue or loss of muscle. But testosterone is only one piece. Many men with fading erections have normal testosterone and a blood vessel, metabolic or sleep problem instead. It is important not to assume the cause is hormonal without testing.

Why this can be a heart health signal

The arteries supplying the penis are small, so narrowing from atherosclerosis can show up there before it causes symptoms in the larger arteries of the heart. Erectile changes share the same risk factors as heart disease: high blood pressure, high cholesterol, diabetes, smoking and obesity. A decline in erections is a good reason to have your blood pressure, cholesterol and blood sugar checked, even if you feel well otherwise.

When to see a doctor urgently

Most changes in erections are not emergencies, but some combinations need prompt attention:

• Call 911 for chest pain or pressure, especially with sweating, nausea, shortness of breath or pain spreading to the arm, jaw or back
• See a clinician soon for erection changes with chest discomfort or breathlessness on exertion, or calf pain when walking that eases with rest
• Seek same-day care for a cold, pale or discolored foot or leg pain at rest
• Seek same-day care for sudden loss of erections after a back injury, fall or pelvic trauma, especially with numbness in the groin or buttocks, leg weakness or bladder or bowel changes
• Get emergency care for an erection lasting more than four hours

What testing can help

Useful blood tests include a morning, fasting total testosterone, repeated on a second morning if low or borderline, as the Endocrine Society recommends; glucose and A1c; a lipid panel; and kidney function. Blood pressure should be measured. If you snore loudly, stop breathing at night or are very sleepy during the day, a sleep study is the way to diagnose sleep apnea.

Blood tests cannot measure blood flow in the penis or rule psychological factors in or out. A three- to four-week log of morning erections, erections with a partner, sleep, alcohol and any new medications gives your clinician a much clearer picture.

Treatment options in general terms

Treatment starts with the cause: managing blood pressure, cholesterol and blood sugar, stopping smoking, cutting alcohol, losing weight and exercising regularly all improve blood vessel health. Treating sleep apnea and reviewing medications with the prescriber can help. If low testosterone is confirmed, testosterone therapy may be considered after a discussion of benefits and risks, including the need to monitor hematocrit and PSA and its suppression of sperm production.

PDE5 inhibitors such as tadalafil and sildenafil are effective for erectile dysfunction from many causes. They are not safe with nitrate medicines and need a review of heart health first. Other options include vacuum devices, injections and, for some men, surgery.

How HealifyMD can help

A HealifyMD clinician can review your symptoms online, order labs including properly timed testosterone, glucose, A1c and lipids, and discuss treatment. Options include tadalafil daily (from $99/month) and, for confirmed low testosterone, testosterone therapy ($249 the first month, lab panel included, then $149/month), with prices confirmed at the eligibility review; other labs are priced separately. We refer chest symptoms, circulation problems and sleep studies to in-person care.